CN108683202A - Energy-storage system - Google Patents

Energy-storage system Download PDF

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Publication number
CN108683202A
CN108683202A CN201810328494.4A CN201810328494A CN108683202A CN 108683202 A CN108683202 A CN 108683202A CN 201810328494 A CN201810328494 A CN 201810328494A CN 108683202 A CN108683202 A CN 108683202A
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CN
China
Prior art keywords
battery
energy
bms
sbcu
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810328494.4A
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Chinese (zh)
Inventor
罗嘉明
胡俊华
彭宪州
张兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Chint Electrics Co Ltd
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Zhejiang Chint Electrics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Chint Electrics Co Ltd filed Critical Zhejiang Chint Electrics Co Ltd
Priority to CN201810328494.4A priority Critical patent/CN108683202A/en
Publication of CN108683202A publication Critical patent/CN108683202A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4257Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/48Controlling the sharing of the in-phase component
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0026Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially using safety or protection circuits, e.g. overcharge/discharge disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • H02J7/0072Regulation of charging or discharging current or voltage using semiconductor devices only
    • H02J7/0077Regulation of charging or discharging current or voltage using semiconductor devices only the charge cycle being terminated in response to electric parameters
    • H02J7/008Regulation of charging or discharging current or voltage using semiconductor devices only the charge cycle being terminated in response to electric parameters with the battery connected to the charge circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • H02J7/0072Regulation of charging or discharging current or voltage using semiconductor devices only
    • H02J7/0088Regulation of charging or discharging current or voltage using semiconductor devices only the charge cycle being terminated in response to non-electric parameters
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The present invention relates to technical field of energy storage, and in particular to a kind of energy-storage system comprising battery system and the battery management system BMS being connected with battery system, battery system include at least one set of battery modules, and battery modules include multiple concatenated single batteries;The battery management system BMS acquires battery modules temperature, and in battery modules single battery monomer battery voltage, in conjunction with the voltage temperature current curve of single battery, the exportable power of system of battery system is calculated in the exportable power for obtaining the exportable power of single battery, and summarizing battery modules in real time;The energy-storage system of the present invention can predict the exportable power of the system of battery system in real time, using the battery system of modularized design, keep its dilatation more convenient, and can be in several scenes application.

Description

Energy-storage system
Technical field
The present invention relates to technical field of energy storage, and in particular to a kind of energy-storage system.
Background technology
The continuous worsening deepened with environment of global energy crisis makes the change of energy field extremely urgent.It meets the tendency of And the generations of electricity by new energy mode such as raw scene also gradually develops, wherein distributed generation technology is generation of electricity by new energy access bulk power grid Effective means.Micro-capacitance sensor is then to cooperate with multigroup distributed generation resource for the small-sized of user load power supply together with energy-storage units parallel connection Autonomous distribution system, it has the advantages that, and flexible for installation, power supply is reliable, high-efficiency cleaning.
It is pre- that current energy-storage system can not carry out the exportable power of battery system in real time according to the battery core ability of battery system It surveys.
Invention content
It is an object of the invention to overcome the deficiencies of existing technologies, a kind of energy-storage system is provided, can predict battery system in real time The exportable power of system of system keeps its dilatation more convenient using the battery system of modularized design, and can be in several scenes Using.
To achieve the above object, present invention employs following technical solutions:
A kind of energy-storage system comprising battery system and the battery management system BMS being connected with battery system, battery system System includes at least one set of battery modules, and battery modules include multiple concatenated single batteries;The battery management system BMS acquisitions The monomer battery voltage of single battery in battery modules temperature and battery modules, in conjunction with voltage-temperature-electricity of single battery Flow curve obtains the exportable power of single battery, and battery system is calculated in the exportable power for summarizing battery modules in real time The exportable power of system of system.
Preferably, the battery management system BMS is Two-stage control framework comprising the operation for acquiring battery modules The two level master control SBCU that multiple level-ones of status information are connected from control SBMU and with multiple level-ones from control SBMU;Battery system System includes multigroup battery modules, and each battery modules are composed in series by multiple single batteries, a battery modules and battery management A level-one of system BMS is connected from control SBMU.
Preferably, the level-one equipped with corresponding connection is from control SBMU in the battery modules, and level-one is from control SBMU and institute The monomer battery voltage that multiple concatenated single battery connections acquire each single battery is stated, the battery modules further include for adopting The temperature sensor of set battery module temperature, level-one are connect from control SBMU with temperature sensor.
Preferably, further include the energy storage inverter PCS being connected with battery management system BMS, battery system and energy storage inversion Device PCS connections.
Preferably, the battery modules further include module radiator fan, and two level master control SBCU is connect with module radiator fan, Control startup/stopping of module radiator fan.
Preferably, further include exchange electrification circuit, direct current electrification circuit, fuse FR1, current divider FL1, relay KM1, Air switch QF1 and pre-charge circuit;
Public electric wire net is connected by exchanging electrification circuit with the two level master control SBCU of battery management system BMS, battery system It is connected with two level master control SBCU by direct current electrification circuit, the cathode of battery system passes through the fuse FR1 that is sequentially connected in series, shunting Device FL1, relay KM1 are connected with energy storage inverter PCS, and the anode of battery system passes through the air switch QF1 that is sequentially connected in series, pre- Charging circuit is connected with energy storage inverter PCS, and two level master control SBCU is connected with relay KM1 and controls its closure/disconnection.
Preferably, further include high-voltage cage, exchange electrification circuit, direct current electrification circuit, fuse FR1, current divider FL1, after Electric appliance KM1, air switch QF1 and pre-charge circuit are arranged in high-voltage cage, the two level master control SBCU peaces of battery management system BMS In high-voltage cage, the level-one of battery management system BMS is arranged from control SBMU in corresponding battery modules, and battery system passes through High-voltage cage is connect with energy storage inverter PCS.
Preferably, the pre-charge circuit includes relay KM2, relay KM3 and preliminary filling resistance R0, and battery system is just Pole is connected by the air switch QF1, preliminary filling resistance R0, relay KM3 being sequentially connected in series with energy storage inverter PCS, relay KM2 It is connected in parallel on the both ends of preliminary filling resistance R0 and relay KM3.
Preferably, the high-voltage cage further includes high-voltage cage operation panel, and air switch is arranged on high-voltage cage operation panel QF2, self-resetting switch SB1, air switch QF3, module correspondence tray connecting port, direct current input anode interface, direct current input cathode Interface, emergency stop switch and indicator light interface, energy storage inverter PCS communication interfaces, public electric wire net power interface, direct current output anode Interface and direct current output cathode interface;
The two level master control SBCU of the battery management system BMS passes through module correspondence tray connecting port and battery management system The level-one of BMS is connected from control SBMU;The two level master control SBCU is connected by public electric wire net power interface with public electric wire net;It is described Two level master control SBCU by DC supply input anode interface, DC supply input cathode interface respectively with battery system just Pole, cathode are connected;The two level master control SBCU by the emergency stop switch and indicator light interface and emergency stop switch, green indicator light, Red indicating light is connected;The two level master control SBCU is connected by energy storage inverter PCS communication interfaces with energy storage inverter PCS; The energy storage inverter PCS is connected by direct current output anode interface, direct current output cathode interface with user load.
Preferably, the exchange electrification circuit includes air switch QF2 and the first AC/DC converters, public electric wire net it is each Mutually it is connected with the end that exchanges of AC/DC converters by air switch QF2, the DC terminal and battery management of the first AC/DC converters The two level master control SBCU of system BMS is connected;
When work, it is closed air switch QF2, after the completion of energy-storage system initialization, the two level master control of battery management system BMS SBCU controls relay KM1 and relay KM3 is closed, and battery management system BMS is automatically into line precharge, after the completion of precharge, Two level master control SBCU control relays KM2 is closed, and control relay KM3 is disconnected, and the high pressure for completing energy-storage system powers on.
Preferably, the direct current electrification circuit include the first DC/DC converters, relay KM4, self-resetting switch SB1 and The anode of air switch QF3, battery system are converted by the air switch QF3, relay KM4 and the first DC/DC being sequentially connected in series The input terminal of device is connected, and self-resetting switch SB1 is in parallel with relay KM4, the cathode of battery system and the first DC/DC converters Input terminal is connected, and the output end of the first DC/DC converters is connected with the two level master control SBCU of battery management system BMS;
When work, it is closed air switch QF3, then presses self-resetting switch SB1, after the completion of energy-storage system initialization, electricity Two level master control SBCU the control relay KM1 and relay KM3 that pond manages system BMS are closed, battery management system BMS automatically into Line precharge, after the completion of precharge, two level master control SBCU control relays KM2 is closed, and relay KM3 is disconnected, and completes energy storage system The high pressure of system powers on.
Preferably, including multigroup battery modules being from top to bottom stacked and and battery is arranged in cabinet, interior of equipment cabinet The connected high-voltage cage of module, battery modules are sequentially connected in series by copper bar and are connected with high-voltage cage, and cabinet fan is arranged at the top of cabinet, Display screen is arranged in cabinet door top, and display screen is connected by CAN bus with battery management system BMS, for showing battery system Running state information.
Preferably, the level-one acquires the single battery of each single battery in battery modules connected to it from control SBMU Battery modules temperature in voltage and battery modules, the voltage-temperature-current curve based on each single battery obtain each list The single battery electric current of body battery, the exportable of single battery can be obtained by being multiplied by single battery electric current by monomer battery voltage Power, then summarize the exportable power of multiple single batteries in battery modules and obtain the exportable power of battery modules;Two level master The exportable power that control SBCU summarizes each battery modules obtains the exportable power of system of battery system.
The energy-storage system of the present invention, including battery system, battery system include at least one set of battery modules, modularized design Battery modules, increase-volume/volume reduction of battery system is convenient and efficient;Further include the battery management system BMS being connected with battery system, Battery management system BMS can acquire the monomer battery voltage of single battery, battery modules temperature in real time, in conjunction with the electricity of single battery Pressure-temperature-current curve predicts the exportable power of system of battery system in real time, it is thus also avoided that battery system appearance is excessively filled The case where electricity/electric discharge, occurs, and is conducive to extend the service life of the present invention.The battery management system of the energy-storage system of the present invention BMS can predict the exportable power of the system of battery system in real time so that energy storage inverter PCS can be according to battery management system The exportable power of system that BMS is provided, controls the charge/discharge of battery system, battery system is avoided to occur overcharging/discharging The case where occur, and can be according to the exportable power of system that battery management system BMS is provided according to the electricity consumption of public electric wire net Price and load supplying situation carry out peak load shifting, and improving energy use efficiency reduces cost.In addition, the high-voltage cage packet of the present invention Exchange electrification circuit and direct current electrification circuit are included, direct current electrification circuit can realize " black starting-up " of the present invention, avoid because in exchange Electric down circuitry and damage the present invention situation occur, furthermore, " black starting-up " design has also been enlarged the present invention application scenarios, make The present invention can also normal use in the scene of no public electric wire net;The display screen of the present invention is touch screen, first user is facilitated to check The running state information and systematic parameter of battery system, two can facilitate write-in and adjustment systematic parameter by touch screen.
Description of the drawings
Fig. 1 is the circuit topology figure of energy-storage system of the present invention;
Fig. 2 is the circuit topology figure of high-voltage cage of the present invention;
Fig. 3 is the circuit topology figure of battery modules of the present invention;
Fig. 4 is the structural schematic diagram of high-voltage cage operation panel of the present invention;
Fig. 5 is the structural schematic diagram of the expansible cabinet-type energy-storage system of the present invention;
Fig. 6 is the structural schematic diagram of battery system of the present invention;
Fig. 7 be single battery of the present invention at different temperatures, the change curve of maximum charging current-voltage of single battery Figure;
Fig. 8 be single battery of the present invention at different temperatures, the change curve of maximum discharge current-voltage of single battery Figure.
Specific implementation mode
Below in conjunction with the embodiment that attached drawing 1 to 8 provides, the specific embodiment party of the energy-storage system further illustrated the present invention Formula.The energy-storage system of the present invention is not limited to the following description.
The energy-storage system of the present invention includes battery system and the battery management system BMS being connected with battery system, battery System includes at least one set of battery modules, and battery modules include multiple concatenated single batteries;The battery management system BMS is adopted The monomer battery voltage of single battery in set battery module temperature and battery modules, in conjunction with the voltage-temperature-of single battery Current curve obtains the exportable power of single battery, and battery is calculated in the exportable power for summarizing battery modules in real time The exportable power of system of system.
Currently, the capacity of battery system is mostly fixed value, not malleable, and also synchronizing mode is single, and it also can not be according to electricity The temperature and single battery ability of cell system carry out the real-time prediction of the exportable power of system of battery system.The energy storage of the present invention System, battery system include the battery modules of modularized design, and it is convenient that increase-volume/volume reduction of battery system facilitates;Its cell tube Reason system BMS can be tied according to the monomer battery voltage for the single battery that it is acquired in real time and the battery modules temperature of battery modules The voltage-temperature-current curve of single battery is closed, the exportable power of system of battery system is calculated in real time, realizes to battery The real-time prediction of the exportable power of system of system, can also avoid battery system from the case where overcharging/discharging occur.
The energy-storage system of the present invention is described further below with reference to Figure of description and specific embodiment.
As shown in Figs. 1-5, it is a preferred embodiment of the present invention, is a kind of expansible cabinet-type energy-storage system, it can Energy-storage system for commercial peak load shifting.
As shown in figure 5, the expansible cabinet-type energy-storage system of the present invention includes battery system and is connected with battery system Battery management system BMS, battery system is connected with battery management system BMS, battery management system BMS and energy storage inverter PCS is connected, and energy storage inverter PCS is connected with AC distribution systems, two-way ammeter successively, and two-way ammeter can directly export the friendship of 480V Galvanic electricity pressure can also export the alternating voltage of 380V by transformer, for inputting public electric wire net and being load supplying.Cell tube Reason system BMS can be tied according to the monomer battery voltage and battery modules temperature of the single battery for the battery modules that it is acquired in real time The voltage-temperature-current curve of single battery is closed, the exportable power of system of battery system is calculated in real time, realizes to battery The real-time prediction of the exportable power of system of system so that energy storage inverter PCS can be provided according to battery management system BMS The exportable power of system, controls the charge/discharge of battery system, and battery system is avoided to occur sending out the case where overcharging/discharge It is raw, and according to the electricity rates of public electric wire net and can be born according to the exportable power of system that battery management system BMS is provided It carries electric power thus supplied and carries out peak load shifting, improving energy use efficiency reduces cost.Preferably, the energy-storage system can also include Energy management system EMS, battery management system BMS are connected with energy management system EMS and energy storage inverter PCS, energy storage inversion Device PCS and energy management system EMS carries out application control based on the exportable power of system that battery management system BMS is provided.
As shown in Fig. 3,6, the battery system includes cabinet, and 12 groups of electricity being from top to bottom stacked are arranged in interior of equipment cabinet Pond module and the high-voltage cage being connected with battery modules, 12 groups of battery modules are sequentially connected in series by copper bar and are connected with high-voltage cage. Certainly, adjacent cell module can also be sequentially connected in series by conducting wire.It should be pointed out that the quantity of battery modules can be according to too The capacity and user power utilization demand of positive energy electricity generation system are adjusted.The battery management system BMS is Two-stage control framework, Include the running state information for acquiring battery modules multiple level-ones from control SBMU and with multiple level-ones from control SBMU phases A two level master control SBCU even;Battery system includes multigroup battery modules, and each battery modules are connected by multiple single batteries Composition, a battery modules are connected with a level-one of battery management system BMS from control SBMU, the two level master control SBCU peaces of BMS In high-voltage cage, the level-one of BMS is arranged from control SBMU in corresponding battery modules, and battery system passes through high-voltage cage and energy storage Inverter PCS connections.As shown in figure 3, the battery modules include multiple concatenated single batteries, it is equipped in the battery modules The level-one of corresponding connection connect each monomer of acquisition with the multiple concatenated single battery from control SBMU, level-one from control SBMU The monomer battery voltage of battery, the battery modules further include the temperature sensor for acquiring battery modules temperature, level-one from Control SBMU is connect with temperature sensor, acquires battery modules temperature.Embodiment as shown in Figure 3, the battery modules include 14 Only single battery, 2 temperature sensors, a 20pin communication connector and a module radiator fan for concatenation, 14 monomers Battery is connected with a level-one of battery management system BMS from control SBMU respectively, and 2 temperature sensors and level-one are from controlling SBMU phases Even, 20pin communication connectors are connected with level-one from control SBMU, 12 20pin communication connectors set associatives and and battery management system The two level master control SBCU of BMS is connected, realize different level-ones between control SBMU communication and level-one from control SBMU and two level master The communication of SBCU is controlled, two level master control SBCU, which is connected with module radiator fan by 20pin communication connectors and controls it, to be started/stop Only.Certainly, the 20pin communication connectors can be two 10pin connectors set associative up and down, can also use it as needed Its set associative structure.
Preferably, model QT-SBMU-14T03A, the model QT- of two level master control of the level-one from control SBMU SBCU-3122, level-one from control SBMU and two level master control execute the present invention predict that the system of battery system can in real time based on temperature The method of output power;NTC temp probes may be used in temperature sensor;Monomer battery voltage can pass through single battery both ends Sampled signal calculate or realized by voltage collection circuit or special chip.
Preferably, the level-one acquires the single battery of each single battery in battery modules connected to it from control SBMU Battery modules temperature in voltage and battery modules, the voltage-temperature-current curve based on each single battery is in other words Voltage-temperature-current table obtains the single battery electric current of each single battery, and single battery electric current is multiplied by by monomer battery voltage The exportable power of single battery can be obtained, then summarizes the exportable power of multiple single batteries in battery modules and obtains battery The exportable power of module;Two level master control SBCU summarize each battery modules exportable power obtain the system of battery system can be defeated Go out power.
For example, as shown in table two or Fig. 7, when 15 DEG C≤battery modules temperature≤45 DEG C, monomer battery voltage are 3.00V, Consult table two is it is found that the chargeable electric current of maximum of single battery is 77.67A at this time, therefore, the exportable work(of maximum of battery modules Rate is 14*3V*77.67A=3262.14W, then the exportable power of maximum of battery system is 12*3262.14W= 39145.68W。
Preferably, when battery modules temperature >=28 DEG C, two level master control SBCU control module radiator fans start, battery When module temperature≤25 DEG C, two level master control SBCU control module radiator fans stop, and ensure battery system in certain temperature range Interior work is conducive to extend the service life of battery system.It should be pointed out that any level-one detects temperature from control SBMU Degree is abnormal, and the i.e. controllable whole radiator fans of two level master control SBCU start.
Preferably, the nominal voltage of the single battery is 3.7VDC, and the discharge current of single battery is 63Ah, battery mould The nominal voltage of group is 3.7VDC × 14=51.8VDC, and the electric energy energy storage capacity of battery system is 12 × 14 × 3.7V × 63Ah= 39.2kWh.14 single batteries of the battery modules are sequentially connected in series by copper bar, or are sequentially connected in series by conducting wire.
The cabinet includes cabinet and the cabinet door that is arranged on front side of cabinet, and cabinet fan, cabinet wind are arranged at the top of cabinet It fans both sides and cabinet lifting lug is set, display screen is arranged in cabinet door top, and red indicating light, green is from top to bottom set gradually on the right side of display screen Multiple heat emission holes are arranged in color indicator light and emergency stop switch, cabinet door lower part.
As shown in Figs. 1-3, energy-storage system includes the high-voltage cage being connected with battery system, battery management system BMS and energy storage Inverter PCS, battery system are electrically connected by high-voltage cage and energy storage inverter PCS, battery management system BMS by CAN bus with Energy storage inverter PCS is connected.Preferably,
The model CPS ECB30KTL-O/US-MANUAL of energy storage inverter PCS.
The battery management system BMS is Two-stage control framework comprising the two level master control being arranged inside high-voltage cage For SBCU and 12 level-one being connected with two level master control SBCU from control SBMU, 12 level-ones are logical by 12 20pin from control SBMU News connector is in parallel to be simultaneously connected with two level master control SBCU, and two level master control SBCU is by 20pin communication connectors and level-one from control SBMU is communicated and is provided working power for it, and two level master control SBCU passes through CAN bus or RS485 communication modes and energy storage inversion Device PCS is connected.Exchange electrification circuit, direct current electrification circuit, fuse FR1, current divider FL1, relay are additionally provided in high-voltage cage KM1, air switch QF1 and pre-charge circuit.
The battery management system BMS can acquire the running state information of battery system, including battery modules temperature, monomer Cell voltage, single battery charge/discharge current, battery modules voltage, battery modules charge/discharge current, battery system electricity Pressure and battery system charge/discharge current, positive and negative anodes insulation against ground value, all relay information.
Battery modules include two temperature sensors, further include for acquiring monomer electricity for acquiring battery modules temperature The voltage sensor of cell voltage and current sensor for acquiring single battery charge/discharge current, battery management system BMS It is connect with temperature sensor, voltage sensor and current sensor.The battery management system BMS is also acquired by sampling A/D chip Each monomer battery voltage information is adopted using current divider acquisition bus current information using NTC temp probe collecting temperature information Positive and negative anodes insulation against ground resistance value is acquired with insulation monitoring module.
Preferably, the two level master control SBCU of the battery management system BMS is connected with the current divider FL1 of high-voltage cage, acquisition The bus current of negative electrode bus, with judge battery system input/output whether overcurrent.Certainly, the two level master control SBCU is also The bus current of negative electrode bus can be acquired by Hall current sensor, but acquisition precision is relatively low.
The two level master control SBCU of the battery management system BMS is electric with the air switch QF1 of high-voltage cage and precharge respectively Node V3 between the relay KM1 and energy storage inverter PCS of node V1, high-voltage cage between road is connected, for detecting relay The state of device KM2, judges whether KM2 sticks together.
The two level master control SBCU of the battery management system BMS respectively with the fuse FR1 of high-voltage cage and current divider FL1 it Between node V2, high-voltage cage relay KM1 and energy storage inverter PCS between node V3 be connected, for detecting relay KM1 State, judge whether relay KM1 sticks together.
The battery management system BMS can according to level-one from control SBMU acquire monomer battery voltage, battery modules temperature, In conjunction with the voltage-temperature-current curve of single battery, the exportable power of battery modules is calculated, and summarizes battery modules Exportable power obtain the maximum exportable power of system of battery system, and energy storage inverter is transferred to by CAN bus PCS。
Below for the maximum charge/discharge electric current of single battery with monomer battery voltage, battery modules temperature variation and The data form of variation, it is specific as follows:
Table one:The maximum charging current of battery system changes with the variation of monomer battery voltage/temperature
Table two:The maximum discharge current of battery system changes with the variation of monomer battery voltage/temperature
Fig. 7 and Fig. 8 is the curve graph drawn based on the data of table one and table two respectively.
As shown in figs. 1 and 3, exchange electrification circuit, direct current electrification circuit, fuse FR1, shunting are equipped in the high-voltage cage Device FL1, relay KM1, air switch QF1 and pre-charge circuit.
Preferably, model the BUSMANN 170M1808,100A of the fuse FR1;The specification of the current divider FL1 For 300A, 75mA.
The public electric wire net is electrically connected by exchanging the two level master control SBCU of electrification circuit and battery management system BMS, battery System is electrically connected by direct current electrification circuit and two level master control SBCU, the cathode of battery system by the fuse FR1 that is sequentially connected in series, Current divider FL1, relay KM1 are connected with energy storage inverter PCS, the positive air switch by being sequentially connected in series of battery system QF1, pre-charge circuit and energy storage inverter PCS are electrically connected, and two level master control SBCU, which is connected with relay KM1 and controls it, to be closed/break It opens, when overcurrent in negative electrode bus, circuit protected cell system can be cut off in fuse FR1.
The exchange electrification circuit includes air switch QF2 and the first AC/DC converters, and each of public electric wire net mutually passes through Air switch QF2 is connected with the end that exchanges of the first AC/DC converters, DC terminal and the two level master control of the first AC/DC converters SBCU is electrically connected.When work, it is closed air switch QF2, the green indicator light of high-voltage cage can flicker several seconds, show energy-storage system just It is initializing, without exception after the completion of initialization, green indicator light is always on, the relay of two level master control SBCU control high-voltage cages KM1 and relay KM3 are closed, and battery management system BMS is automatically into line precharge, after the completion of precharge, two level master control SBCU controls The relay KM2 of high-voltage cage processed is closed, and relay KM3 is disconnected, and the high pressure for completing energy-storage system powers on.
Preferably, the public electric wire net provides 340-550V three-phase alternating-current supplies, or provides the exchange of 340-550V two-phases Power supply.
Preferably, the public electric wire net provides 480V three-phase alternating-current supplies.
The direct current electrification circuit includes the first DC/DC converters, relay KM4, self-resetting switch SB1 and air switch QF3, the positive input for passing through the air switch QF3, relay KM4 and the first DC/DC converters that are sequentially connected in series of battery system End is connected, and self-resetting switch SB1 is in parallel with relay KM4, the input terminal phase of the cathode of battery system and the first DC/DC converters Even, the output end of the first DC/DC converters is electrically connected with the two level master control SBCU of battery management system BMS.When work, it is closed air Then switch QF3 presses self-resetting switch SB1, continue 1-2s, and the green indicator light of high-voltage cage flickers several seconds, such as 4-5s, table Bright energy-storage system is initializing, and without exception after the completion of initialization, green indicator light is always on, and two level master control SBCU controls high pressure The relay KM2 of box is closed, and relay KM3 is disconnected, and the high pressure for completing system powers on.
The energy-storage system offer 24VDC work electricity for exchanging electrification circuit and direct current electrification circuit all can be of the invention Source.
It should be pointed out that the expansible cabinet-type energy-storage system of the present invention can only include direct current electrification circuit, it can be real The black starting-up of the existing present invention, even if the present invention is activated in the case of no public electric wire net.Certainly, the present invention can also wrap simultaneously It includes direct current electrification circuit and exchanges electrification circuit, it is preferential to use exchange electrification circuit on energy-storage system when the present invention powers on Electricity, after powering on successfully, the relay KM4 of direct current electrification circuit is closed automatically, and manual closing air switch QF3 is powered on direct current Circuit influences relay as stand-by power supply, when public electric wire net powers off, to avoid relay from being cut off in the case where band carries The case where device service life, occurs, and also ensures the normal work of the present invention.
The present invention during shutdown, is carried out by operations described below:
1. confirming that the present invention does not export user load, energy storage inverter PCS does not carry out charge/discharge to battery system;
2. disconnecting the air switch QF3 of the direct current electrification circuit of high-voltage cage, the relay in disconnecting circuit;
3. disconnecting the air switch QF2 of the exchange electrification circuit of high-voltage cage, energy-storage system shutdown.
The pre-charge circuit includes relay KM2, relay KM3 and preliminary filling resistance R0, and the anode of battery system passes through Air switch QF1, preliminary filling resistance R0, the relay KM3 being sequentially connected in series are connected with energy storage inverter PCS, and relay KM2 is connected in parallel on Preliminary filling resistance R0 and the both ends relay KM3, two level master control SBCU are connected with relay KM2, relay KM3 and control the two respectively Closure/disconnection.
Preferably, the specification of the preliminary filling resistance R0 is 150 Ω, 100W.It should be pointed out that the preliminary filling resistance R0 Resistance value changes with the change of the cell system voltage of battery system.
Preferably, it is arranged as shown in figure 4, the high-voltage cage includes high-voltage cage operation panel, on high-voltage cage operation panel empty Air cock QF2, self-resetting switch SB1, air switch QF3, module correspondence tray connecting port, direct current input anode interface, direct current are defeated It is defeated to enter cathode interface, emergency stop switch and indicator light interface, energy storage inverter PCS communication interfaces, public electric wire net power interface, direct current Go out anode interface and direct current output cathode interface.
Preferably, the air switch QF2, air switch QF3 can also be arranged in the cabinet door of cabinet.
The circuit link position and relationship of the air switch QF2, self-resetting switch SB1 and air switch QF3 are upper Described in the text, details are not described herein.The two level master control SBCU of the battery management system BMS by module correspondence tray connecting port with 20pin communication connectors are connected, and realize the communication of two level master control SBCU and level-one from control SBMU.The anode of the battery system is logical It crosses direct current input anode interface to be respectively connected with air switch QF3 air switches QF1, the cathode of battery system is inputted by direct current Cathode interface is connected with the direct-flow input end of the first DC/DC converters.The emergency stop switch passes through the emergency stop switch and indicator light Interface is serially connected in the power supply positive input of two level master control SBCU, the working power for cutting off battery management system BMS, green Indicator light and red indicating light are connected by the emergency stop switch and indicator light interface with two level master control SBCU.The common electrical Netcom Public electric wire net power interface is crossed to be electrically connected with air switch QF2.The high-voltage cage passes through direct current output anode interface and direct current output Cathode interface is connected with user load.
The energy storage inverter PCS includes EMS, and energy storage inverter PCS is upper with the exportable power of the system of battery system When limit carries out charge/discharge to battery system, battery management system BMS in real time by the maximum charge/discharge electric current of battery system, It is reported to energy storage inverter PCS by CAN bus, the charge/discharge current of energy storage inverter PCS control battery systems must not surpass Cross the maximum charge/discharge electric current for the battery system that battery management system BMS is reported.
Preferably, the EMS carries out power dispatching using the exportable power of system as the upper limit to battery system, realizes optimal Most economical grid-connected strategy.
When energy storage inverter PCS carries out charge/discharge to battery system, battery management system BMS passes through its all kinds of biography Sensor detects the operating status and alert of battery system in real time, and energy storage inverter PCS alarms to battery system Grading control:
When battery system charges:Level-one is alarmed, and after level-one alarm occurs, battery management system BMS is reported to energy storage inversion The current value of the battery system of device PCS halves, and EMS controls the electricity that charging current is no more than battery management system BMS real-time reports Flow valuve;Secondary alarm, under the premise of forbidding charging to battery system, if alarm be " monomer voltage high ", " stagnation pressure is high ", " charging current is big " allows battery system electric discharge, other situations to forbid discharging;Three-level is alarmed, and energy storage inverter PCS is shut down, After battery management system BMS delay 3s, main just/main negative relay of cut-out, and need artificial maintenance, after debugging, again for Energy-storage system powers on.
When battery system discharges:Level-one is alarmed, and after level-one alarm occurs, battery management system BMS is reported to energy storage inversion The current value of device PCS halves, and the real-time discharge current of EMS control battery systems is no more than the electricity that battery management system BMS is reported Flow valuve;Secondary alarm, under the premise of forbidding battery system to discharge, if alarm is " monomer is low (monomer battery voltage is low) " " always forcing down (battery system total voltage is low) " " discharge current is big (battery system discharge current is big) ", then allow to fill to battery system Electricity, other situations forbid charging to battery system;Three-level is alarmed, and energy storage inverter PCS is shut down, battery management system BMS delays After 3s, main just/main negative relay of cut-out.It needs manually to overhaul, after debugging, be powered on again for energy-storage system.Following table is table Three, the type of level-one alarm, secondary alarm, three-level alarm is listed respectively, specifically see the table below:
It should be pointed out that the present invention includes two kinds of basic working modes, normal mode and debugging mode.
Normally after the power is turned on, battery is normal for normal mode, i.e. energy-storage system of the invention, leads the negative relay of just/master and closes automatically It closes, battery system is in charge/discharge wait state, and user can observe battery management system BMS by display screen or host computer Parameters and battery system running state information.
Debugging mode, i.e., no matter battery system is in charge or discharge, once there is three-level alarm, battery management system Main just/main negative relay of BMS cut-outs, by PC control master just/state of main negative relay, that is, enter debugging mode;If Battery system is under-voltage or over-pressed, and using energy storage inverter PCS manual modes, charge or discharge, this pattern are carried out to battery system Under, battery management system BMS loses automatic protection functions, and when alarming again, battery management system BMS will not cut off master Just/master negative relay restarts energy-storage system, battery management system BMS automatic identifications enter normal mode after user's debugging Formula.
Preferably, expansible cabinet-type energy-storage system of the invention further includes display screen, the two level of battery management system BMS Master control SBCU is connected by UCS with display screen, and two level master control SBCU and UCS, UCS and display screen are communicated by CAN bus, and two Grade master control SBCU is UCS, display screen provides working power, and display screen is used to show the running state information of battery system.
Preferably, the display screen is touch screen display screen, and user can be by what battery management system BMS was arranged in display screen It unites the numerical value of exportable power.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention's Protection domain.

Claims (10)

1. a kind of energy-storage system, it is characterised in that:It includes battery system and the battery management system that is connected with battery system BMS, battery system include at least one set of battery modules, and battery modules include multiple concatenated single batteries;The battery management The monomer battery voltage of single battery in system BMS acquisition battery modules temperature and battery modules, in conjunction with the electricity of single battery Pressure-temperature-current curve obtains the exportable power of single battery, and the exportable power for summarizing battery modules calculates in real time Obtain the exportable power of system of battery system.
2. energy-storage system according to claim 1, it is characterised in that:The battery management system BMS is Two-stage control frame Structure comprising for acquire battery modules running state information multiple level-ones from control SBMU and with multiple level-ones from control A connected SBMU two level master control SBCU;Battery system includes multigroup battery modules, and each battery modules are by multiple monomers electricity Pond is composed in series, and a battery modules are connected with a level-one of battery management system BMS from control SBMU.
3. energy-storage system according to claim 2, it is characterised in that:Equipped with corresponding connection in the battery modules Level-one connect the single battery for acquiring each single battery from control SBMU from control SBMU, level-one with the multiple concatenated single battery Voltage, the battery modules further include the temperature sensor for acquiring battery modules temperature, and level-one is passed from control SBMU and temperature Sensor connects.
4. energy-storage system according to claim 2, it is characterised in that:It further include the storage being connected with battery management system BMS Energy inverter PCS, battery system are connect with energy storage inverter PCS.
5. energy-storage system according to claim 3, it is characterised in that:The battery modules further include module radiator fan, Two level master control SBCU is connect with module radiator fan, controls startup/stopping of module radiator fan.
6. energy-storage system according to claim 4, it is characterised in that:Further include exchange electrification circuit, direct current electrification circuit, Fuse FR1, current divider FL1, relay KM1, air switch QF1 and pre-charge circuit;
Public electric wire net is connected by exchanging electrification circuit with the two level master control SBCU of battery management system BMS, and battery system passes through Direct current electrification circuit is connected with two level master control SBCU, and the cathode of battery system passes through the fuse FR1, the current divider that are sequentially connected in series FL1, relay KM1 are connected with energy storage inverter PCS, positive air switch QF1, the preliminary filling by being sequentially connected in series of battery system Circuit is connected with energy storage inverter PCS, and two level master control SBCU is connected with relay KM1 and controls its closure/disconnection.
7. energy-storage system according to claim 6, it is characterised in that:Further include high-voltage cage, on exchange electrification circuit, direct current Circuit, fuse FR1, current divider FL1, relay KM1, air switch QF1 and pre-charge circuit are arranged in high-voltage cage, electricity The two level master control SBCU that pond manages system BMS is mounted in high-voltage cage, and the level-one of battery management system BMS exists from control SBMU settings In corresponding battery modules, battery system is connect by high-voltage cage with energy storage inverter PCS.
8. energy-storage system according to claim 6, it is characterised in that:The pre-charge circuit includes relay KM2, relay Device KM3 and preliminary filling resistance R0, the positive air switch QF1, preliminary filling resistance R0, relay by being sequentially connected in series of battery system KM3 is connected with energy storage inverter PCS, and relay KM2 is connected in parallel on the both ends of preliminary filling resistance R0 and relay KM3.
9. energy-storage system according to claim 7, it is characterised in that:The high-voltage cage further includes high-voltage cage operation panel, Air switch QF2, self-resetting switch SB1, air switch QF3, module correspondence tray connecting port, straight is set on high-voltage cage operation panel Stream input anode interface, direct current input cathode interface, emergency stop switch and indicator light interface, energy storage inverter PCS communication interfaces, public affairs Common-battery network source interface, direct current output anode interface and direct current output cathode interface;
The two level master control SBCU of the battery management system BMS is by module correspondence tray connecting port with battery management system BMS's Level-one is connected from control SBMU;The two level master control SBCU is connected by public electric wire net power interface with public electric wire net;The two level Master control SBCU is positive, negative with battery system respectively by DC supply input anode interface, DC supply input cathode interface Extremely it is connected;The two level master control SBCU is referred to by the emergency stop switch and indicator light interface with emergency stop switch, green indicator light, red Show that lamp is connected;The two level master control SBCU is connected by energy storage inverter PCS communication interfaces with energy storage inverter PCS;The storage Energy inverter PCS is connected by direct current output anode interface, direct current output cathode interface with user load.
10. energy-storage system according to claim 6, it is characterised in that:The exchange electrification circuit includes air switch QF2 With the first AC/DC converters, each of public electric wire net is mutually connected by air switch QF2 with the end that exchanges of AC/DC converters, and first The DC terminal of AC/DC converters is connected with the two level master control SBCU of battery management system BMS;
When work, it is closed air switch QF2, after the completion of energy-storage system initialization, the two level master control SBCU of battery management system BMS It controls relay KM1 and relay KM3 is closed, battery management system BMS is automatically into line precharge, after the completion of precharge, two level Master control SBCU control relays KM2 is closed, and control relay KM3 is disconnected, and the high pressure for completing energy-storage system powers on.
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